This is likely an actual bug and not an Easter egg or a deliberately wrong suggestion.
Google Translate doesn't work by people typing dictionaries into a computer - instead, it's a statistical thing where it compares texts to extract common terms between two languages. People quite frequently make lists of bands, and it's quite likely that these lists might be similar between languages - except a local band might take the place of a US band in these lists - and the statistical process gets a wrong result.
If I recall correctly, earlier Google Translate versions had similar issues with famous political figures.